During this event, new quests will also be made available. The quests either reward you with another copy of either Female Robin or Navarre – or event with orbs. Many of the quests task you with accomplishing varying difficult tasks. For instance, having Alfonse on your team when you beat Female Robin or using a Navarre to beat a level 40 Navarre. I never said they were easy or practical.
Either way, this should provide some interesting challenges while also giving you extra copies of these characters just in case you wanted to “inherit” their abilities away to other characters. In particular, Female Robin’s Blue Tomebreaker is one such skill that might be useful for inheritance, especially considering how popular and powerful the blue mage Linde is.
Stay on the look out for guides to both the Navarre and Female Robin coming out within the next day.